$12\mathrm{.}34$ What's wrong with your stock fund? Last year you looked at all the financial firms that had stock growth funds. You picked the growth fund that had the best performance last year $($ranking at the $99$ th percentur on performance$)$ ancruvested all your money in it this year, This year, with its new investmons $10$ ranked only at the $65$ thpercentile on performance. Your friend suggests that its stoc prekeroecame complacent or was burned our Can you give another explanation?